What does DataFrame.head() do?
PICTURE THIS: HOW TO EXPLAIN IT
Simple meaning
head() returns the first few rows, five by default, so you can sanity-check columns and values.
WHY — Pandas instead of guessing?
Why interviewers care about Pandas:
who only read docs from people who shipped.
and tied to Data Science work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1head() returns the first
few rows, five by default, so you can sanity-check columns and values.
- 2It is an EDA
habit, not a statistical summary.
- 3Pair it with tail(),
sample(), and info() so you are not fooled by a clean header and messy later rows.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
head() returns the first few rows, five by default, so you can sanity-check columns and values. It is an EDA habit, not a statistical summary.